Problem 4
Answer: Choice A) Ray AB
Explanation:
To name a ray, you start at the endpoint and then name any other point on the ray. So this is ray AB. You would not say ray BA since that points in the complete opposite direction.
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Problem 5
Answer: B) 3
Explanation:
The top and bottom segments are the same length, so (2x-2)+11 and 6x-3 are equal to one another. Solving (2x-2)+11 = 6x-3 leads to x = 3
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Problem 6
Answer: D) 3
Explanation:
We follow the same idea as the previous problem. This time we're solving (2x-5)+(3x+1) = 11 to get x = 3; coincidentally we get the same answer, but that won't always be the case.
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Problem 7
Answer: D) 4
Explanation:
Add up the endpoints and divide by 2. So we'll compute (X+Y)/2 = (-22+30)/2 = 8/2 = 4.
